:root {
  color-scheme: dark;
  --bg: #0e1116;
  --bg2: #151a22;
  --bg3: #1c232e;
  --card: #171d26;
  --card2: #1f2733;
  --line: #2a3442;
  --text: #e8ecf2;
  --muted: #97a1b0;
  --accent: #4f8cff;
  --accent2: #6ee7a8;
  --danger: #ff6b6b;
  --warn: #ffd166;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 80% -10%, #1b2a44 0%, var(--bg) 55%);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app { display: flex; min-height: 100vh; }

/* ---------- sidebar ---------- */
.sidebar {
  width: 240px;
  flex: 0 0 240px;
  background: rgba(16, 21, 28, .85);
  border-right: 1px solid var(--line);
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 6px; }
.logo {
  width: 38px; height: 38px; border-radius: 11px;
  display: grid; place-items: center; font-size: 20px;
  background: linear-gradient(135deg, #2d5bd6, #6ea8ff);
}
.brand-title { font-weight: 700; font-size: 15px; }
.brand-sub { font-size: 11px; color: var(--muted); letter-spacing: 1.4px; }

#nav { display: flex; flex-direction: column; gap: 4px; }
#nav a {
  color: var(--muted); text-decoration: none; padding: 10px 12px;
  border-radius: 10px; font-size: 14px; transition: .15s;
}
#nav a:hover { background: var(--bg3); color: var(--text); }
#nav a.active { background: linear-gradient(90deg, #22304a, #1a2230); color: #fff; box-shadow: inset 2px 0 0 var(--accent); }

.side-progress { margin-top: auto; padding: 10px 6px; }
.side-progress-label { font-size: 11px; color: var(--muted); margin-bottom: 6px; }
.side-progress-value { font-size: 12px; color: var(--muted); margin-top: 5px; }
.bar { height: 7px; background: var(--bg3); border-radius: 99px; overflow: hidden; }
.bar > span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, #4f8cff, #6ee7a8); transition: width .4s; border-radius: 99px; }
.side-footer { font-size: 10.5px; color: #5f6b7c; padding: 6px; line-height: 1.5; }

/* ---------- main ---------- */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 22px; border-bottom: 1px solid var(--line);
  background: rgba(14, 17, 22, .7); backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.top-title { font-weight: 600; font-size: 16px; }
.top-right { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.pill {
  font-size: 12px; padding: 6px 10px; border-radius: 99px;
  background: var(--bg3); border: 1px solid var(--line); color: var(--muted);
}
.icon-btn {
  background: var(--bg3); border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; width: 34px; height: 34px; cursor: pointer; font-size: 15px;
}
.icon-btn:hover { border-color: var(--accent); }
#menuBtn { display: none; }

.view { padding: 24px; max-width: 980px; width: 100%; margin: 0 auto; }
h1 { font-size: 22px; margin: 0 0 6px; }
h2 { font-size: 17px; margin: 26px 0 10px; }
h3 { font-size: 14.5px; margin: 18px 0 8px; color: var(--text); }
p { line-height: 1.6; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.center { text-align: center; }

/* cards / grid */
.hero {
  background: linear-gradient(135deg, rgba(45, 91, 214, .28), rgba(110, 231, 168, .12));
  border: 1px solid #2e4058; border-radius: 18px; padding: 22px;
}
.hero h1 { font-size: 24px; }
.grid { display: grid; gap: 12px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px;
}
.card.click { cursor: pointer; transition: .15s; }
.card.click:hover { border-color: var(--accent); transform: translateY(-1px); }
.stat-value { font-size: 24px; font-weight: 700; }
.stat-label { font-size: 12px; color: var(--muted); }

/* plan */
.day-row {
  display: flex; align-items: center; gap: 14px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px 16px; margin-bottom: 10px;
}
.day-num {
  width: 38px; height: 38px; flex: 0 0 38px; border-radius: 11px;
  display: grid; place-items: center; font-weight: 700;
  background: var(--bg3); border: 1px solid var(--line);
}
.day-row.done .day-num { background: rgba(110, 231, 168, .15); border-color: #2f6b4f; color: var(--accent2); }
.day-info { flex: 1; min-width: 0; }
.day-title { font-weight: 600; font-size: 14.5px; }
.day-sub { font-size: 12px; color: var(--muted); }
.badge { font-size: 11px; padding: 4px 9px; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); }
.badge.ok { color: var(--accent2); border-color: #2f6b4f; background: rgba(110, 231, 168, .08); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, #2f6bff, #4f8cff); color: #fff;
  border: 0; border-radius: 11px; padding: 10px 16px; font-size: 14px;
  font-weight: 600; cursor: pointer; transition: .15s;
}
.btn:hover { filter: brightness(1.1); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.ghost { background: var(--bg3); border: 1px solid var(--line); color: var(--text); }
.btn.small { padding: 7px 12px; font-size: 12.5px; border-radius: 9px; }
.btn.danger { background: #3a1f26; border: 1px solid #5b2b36; color: #ff8f8f; }

/* module */
.module-head {
  display: flex; gap: 14px; align-items: flex-start;
  border-bottom: 1px solid var(--line); padding-bottom: 16px; margin-bottom: 18px;
}
.module-icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  font-size: 22px; background: var(--bg3); border: 1px solid var(--line); flex: 0 0 46px;
}
.model-sentence {
  border-left: 3px solid var(--accent); background: var(--card);
  padding: 12px 14px; border-radius: 0 12px 12px 0; margin-bottom: 10px;
}
.model-role { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: var(--accent); margin-bottom: 5px; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; }

code, .mono { font-family: "Cascadia Code", Consolas, monospace; font-size: 12.5px; }
.tag { background: var(--bg3); border: 1px solid var(--line); padding: 2px 7px; border-radius: 6px; }

/* questions */
.q-block { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 10px; }
.q-head { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 10px; font-size: 14px; line-height: 1.5; }
.q-num { font-weight: 700; color: var(--accent); flex: 0 0 auto; }
.q-options { display: flex; gap: 8px; flex-wrap: wrap; }
.q-options button {
  background: var(--bg3); border: 1px solid var(--line); color: var(--text);
  padding: 7px 13px; border-radius: 9px; cursor: pointer; font-size: 12.5px;
}
.q-options button:hover { border-color: var(--accent); }
.q-options button.sel { background: #23365a; border-color: var(--accent); }
.q-gap { width: 100%; background: var(--bg3); border: 1px solid var(--line); color: var(--text); border-radius: 9px; padding: 9px 11px; font-size: 13.5px; }
.q-input-row { display: flex; gap: 8px; align-items: center; }
.q-feedback { margin-top: 9px; font-size: 12.5px; line-height: 1.5; }
.q-block.correct { border-color: #2f6b4f; }
.q-block.wrong { border-color: #6b2f3a; }
.q-block.correct .q-feedback { color: var(--accent2); }
.q-block.wrong .q-feedback { color: #ff9b9b; }

.result-box {
  background: linear-gradient(135deg, rgba(79, 140, 255, .18), rgba(110, 231, 168, .12));
  border: 1px solid #2e4a6b; border-radius: var(--radius); padding: 16px; margin-top: 14px;
  display: flex; gap: 16px; align-items: center; flex-wrap: wrap;
}
.result-score { font-size: 30px; font-weight: 800; }
.result-label { font-size: 12px; color: var(--muted); }

textarea {
  width: 100%; min-height: 140px; background: var(--bg3); color: var(--text);
  border: 1px solid var(--line); border-radius: 12px; padding: 12px;
  font-size: 14px; line-height: 1.55; resize: vertical; font-family: inherit;
}
textarea:focus { outline: none; border-color: var(--accent); }

.checks { display: grid; gap: 8px; }
.check-item { display: flex; gap: 9px; align-items: flex-start; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 13.5px; }
.check-item.ok { border-color: #2f6b4f; }
.check-item.bad { border-color: #6b2f3a; }
.check-item input { margin-top: 2px; }

.audio-box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-bottom: 16px; }
audio { width: 100%; margin-top: 8px; }

.passage { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.passage p { margin: 0 0 12px; font-size: 14.5px; line-height: 1.7; }
.passage .label { color: var(--accent); font-weight: 700; margin-right: 6px; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin-top: 12px; }
details summary { cursor: pointer; font-weight: 600; font-size: 13.5px; }
details p { font-size: 14px; line-height: 1.7; color: #cfd6e0; }

/* timer */
.timer {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px;
}
.timer-value { font-size: 34px; font-weight: 800; font-variant-numeric: tabular-nums; }
.timer-value.warn { color: var(--warn); }
.timer-value.danger { color: var(--danger); }

/* vocab */
.vocab-card {
  min-height: 190px; display: grid; place-items: center; text-align: center;
  background: linear-gradient(160deg, #1a2331, #151b24);
  border: 1px solid var(--line); border-radius: 18px; padding: 24px; cursor: pointer;
  transition: .2s; position: relative;
}
.vocab-card:hover { border-color: var(--accent); }
.vocab-word { font-size: 26px; font-weight: 700; }
.vocab-meaning { font-size: 18px; color: var(--accent2); margin-top: 10px; }
.vocab-example { font-size: 13px; color: var(--muted); margin-top: 12px; line-height: 1.55; }
.vocab-hint { position: absolute; bottom: 12px; font-size: 11px; color: #61708a; }
.vocab-meta { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.vocab-actions { display: flex; gap: 10px; margin-top: 14px; }
.vocab-actions .btn { flex: 1; justify-content: center; }

/* progress page */
.module-progress-row { display: flex; align-items: center; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.module-progress-row .bar { flex: 1; }
.score-tag { font-size: 12px; color: var(--muted); min-width: 64px; text-align: right; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #1d2a3d; border: 1px solid #35507a; color: #e8ecf2;
  padding: 11px 18px; border-radius: 12px; font-size: 13.5px; opacity: 0;
  transition: .25s; pointer-events: none; z-index: 50; box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- error notebook ---------- */
.err-card { background: var(--card); border: 1px solid var(--line); border-left: 3px solid var(--danger); border-radius: 12px; padding: 14px 16px; margin-bottom: 10px; }
.err-prompt { font-size: 14px; line-height: 1.55; margin-bottom: 8px; }
.err-meta { display: flex; gap: 10px; flex-wrap: wrap; font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.err-wrong { color: #ff9b9b; }
.err-right { color: var(--accent2); }
.err-explain { font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.err-actions { display: flex; gap: 8px; margin-top: 10px; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }
.empty-state .big { font-size: 44px; margin-bottom: 10px; }

/* ---------- writing analysis / rubric ---------- */
.band-box {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(79,140,255,.16), rgba(110,231,168,.1));
  border: 1px solid #2e4a6b; border-radius: var(--radius); padding: 16px; margin-top: 12px;
}
.band-value { font-size: 38px; font-weight: 800; line-height: 1; }
.band-label { font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; }
.rubric { display: grid; gap: 10px; margin-top: 12px; }
.rubric-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.rubric-name { flex: 1; min-width: 160px; font-size: 13px; }
.rubric-opts { display: flex; gap: 6px; }
.rubric-opts button {
  width: 34px; height: 32px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--bg3); color: var(--muted); font-size: 12.5px; cursor: pointer;
}
.rubric-opts button.sel { background: #23365a; border-color: var(--accent); color: #fff; font-weight: 700; }
.stat-mini { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); margin-top: 8px; }
.stat-mini b { color: var(--text); }
.tag.warn { border-color: #6b532f; color: #ffd166; }
.tag.bad { border-color: #6b2f3a; color: #ff9b9b; }
.tag.good { border-color: #2f6b4f; color: var(--accent2); }

/* ---------- bottom nav (mobil) ---------- */
.bottom-nav { display: none; }
@media (max-width: 860px) {
  .sidebar { position: fixed; left: -270px; z-index: 60; transition: .2s; height: 100vh; box-shadow: 0 0 40px rgba(0,0,0,.5); }
  .sidebar.open { left: 0; }
  #menuBtn { display: inline-grid; place-items: center; }
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid.cols-2 { grid-template-columns: 1fr; }
  .view { padding: 14px 14px 96px; }
  .topbar { padding: 12px 14px; }

  .bottom-nav {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
    background: rgba(16, 21, 28, .96); backdrop-filter: blur(12px);
    border-top: 1px solid var(--line);
    padding: 6px 6px calc(6px + env(safe-area-inset-bottom));
    justify-content: space-around;
  }
  .bottom-nav a {
    flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
    padding: 8px 4px; border-radius: 12px; text-decoration: none; color: var(--muted);
    font-size: 10.5px; min-height: 52px; justify-content: center;
  }
  .bottom-nav a.active { color: #fff; background: rgba(79,140,255,.16); }
  .bottom-nav .bn-icon { font-size: 18px; line-height: 1; }
  .bottom-nav .bn-label { font-size: 10.5px; }

  /* mobil: kattaroq tegish maydonlari */
  .btn { min-height: 44px; }
  .btn.small { min-height: 38px; }
  .q-options button { min-height: 42px; padding: 9px 14px; }
  .q-gap, .q-input-row input { min-height: 44px; }
  .icon-btn { width: 40px; height: 40px; }
  .vocab-actions { flex-wrap: wrap; }
  .vocab-actions .btn { flex: 1 1 44%; }
  .day-row { padding: 12px; }
  .rubric-opts button { width: 38px; height: 38px; }
  textarea { font-size: 16px; } /* iOS zoom oldini olish */
}